Brand x top cap and star nut bmxthe brand x bmx top cap and star nut are designed to offer superior reliability quality and performance at an exceptional price point the hollow steel bolt allows you to route the brake through the centre of the headtube so the bars can spin 360 degrees features material alloy top cap and steel hollow bolt bolt size m10xp1 25 weight 40gbuy brand x components from chain reaction cycles the worlds largest online bike store